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Simplified Assistive Devices for Upper Limbs
Ryoichi Suzuki,Nobuaki Fujiki,Shigehiko Furuya,Eidai Ito,Nobuaki Kobayashi,Eberhard P. Hofer 제어로봇시스템학회 2015 제어로봇시스템학회 국제학술대회 논문집 Vol.2015 No.10
The purpose of this research is to develop an assistive device for upper limbs. The disturbance estimation property of the internal model control is applied to detect motion intention of users. The experimental prototype of the assistive device for upper limbs is developed to evaluate the proposed control method. Effectiveness of the proposed method is verified by experiments. The experimental results include also that muscular activities occur in several muscles using surface electromyography. The proposed device is expected to maintain residual function of upper limbs.
Hisao Suzuki,Kensuke Kuroda,Masazumi Okido,Ryoichi Ichino 한국표면공학회 2010 한국표면공학회 학술발표회 초록집 Vol.2010 No.11
To improve the anti-corrosion property of AZ31 Mg alloy, in the present study we tried to form thin films using electrodeposition, anodizing and thermal oxidation. The flake-like hydroxyapatite (HAp) film was formed by electrodeposition in a solution containing Ca and P ions, the MgO film indicating a white color by anodizing in a solution of NaOH, and the MgO film indicating a interference color by thermal oxidation in air, respectively. From the results of anti-corrosion measurements, we found that these films had the anti-corrosion property in simulated body fluid (SBF).
Field Server Monitoring System for Construction of IT Farming and Agri-tourism
Yasunori Saito,Takanobu Suzuki,Kin-ichi Kobayashi,Katsuharu Sato,Masayuki Hirafuji,Tokihiro Fukatsu,Ryozo Ichimura,Ryoichi Yashiro,Setsuo Takeuchi,Kazuhiko Yuasa,Sumio Watanabe,Fumitoshi Kobayashi,Tak 제어로봇시스템학회 2006 제어로봇시스템학회 국제학술대회 논문집 Vol.2006 No.10
Development of a WLAN Based Monitoring System for Group Activity Measurement in Real-Time
Tsunoda, Hiroshi,Nakayama, Hidehisa,Ohta, Kohei,Suzuki, Akihiro,Nishiyama, Hiroki,Nagatomi, Ryoichi,Hashimoto, Kazuo,Waizumi, Yuji,Keeni, Glenn Mansfield,Nemoto, Yoshiaki The Korea Institute of Information and Commucation 2011 Journal of communications and networks Vol.13 No.2
In recent years, there has been a rise in epidemiological evidence suggesting the health benefits of a physically active lifestyle. However, it is not always easy for individuals to personally recognize the optimal conditions for exercise and physical activity. Wearable acceleration-based pedometers have become widely used in estimating the amount of physical activity, and to a limited extent, providing information regarding exercise intensity, but they have never been used to assess adaptation to exercise. In order to realize simultaneous activity monitoring for multiple users exercising outdoors, we developed a prototype wireless local area network (WLAN) based system. In our system, a WLAN is deployed outside, and a user wearing a smart phone and monitoring device exercises freely within the coverage area of the wireless network. By doing so, the developed system is able to monitor the activity of each user andmeasures various parameters including those related to exercise adaptation. In a demonstration experiment, the developed system was evaluated and used to monitor users enjoying a Nordic walk, after which users were immediately able to receive their exercise report. In this paper, we discuss the requirements and issues in developing an activity monitoring system and report the findings we obtained through the demonstration experiment.
Development of a WLAN Based Monitoring System for Group Activity Measurement in Real-Time
Hiroshi Tsunoda,Hidehisa Nakayama,Kohei Ohta,Akihiro Suzuki,Hiroki Nishiyama,Ryoichi Nagatomi,Kazuo Hashimoto,Yuji Waizumi,Glenn Mansfield Keeni,Yoshiaki Nemoto 한국통신학회 2011 Journal of communications and networks Vol.13 No.2
In recent years, there has been a rise in epidemiological evidence suggesting the health benefits of a physically active lifestyle. However, it is not always easy for individuals to personally recognize the optimal conditions for exercise and physical activity. Wearable acceleration-based pedometers have become widely used in estimating the amount of physical activity, and to a limited extent,providing information regarding exercise intensity, but they have never been used to assess adaptation to exercise. In order to realize simultaneous activity monitoring for multiple users exercising outdoors, we developed a prototype wireless local area network (WLAN) based system. In our system, a WLAN is deployed outside, and a user wearing a smart phone and monitoring device exercises freely within the coverage area of the wireless network. By doing so, the developed system is able to monitor the activity of each user andmeasures various parameters including those related to exercise adaptation. In a demonstration experiment, the developed system was evaluated and used to monitor users enjoying a Nordic walk, after which users were immediately able to receive their exercise report. In this paper, we discuss the requirements and issues in developing an activity monitoring system and report the findings we obtained through the demonstration experiment.
Masatoshi Sato,Yoshiaki Kobayashi,Takayuki Kawamata,Yukio Yasui,Kazunori Suzuki,M. Itoh,Ryoichi Kajimoto,Kazuhiko Ikeuchi,M. Arai,Phillipe Bourges 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
To identify the superconducting symmetry of Fe-based superconductors, we studied effects ofnonmagnetic-impurities on Tc, magnetic excitation spectra 00 and NMR 1/T1 − T curve, whichare sensitive to the relative signs between the order parameters on the disconnected Fermi surfacesin reciprocal space, because the symmetry is closely connected with the pairing mechanism:If the signs are opposite (symmetry S±), the mechanism is considered to be a magneticone, but when the signs are the same (symmetry S++), a novel mechanism is plausible becausethe ordinary phonon mechanism cannot realize the Tc value as high as 55 K found in Ln1111(Ln=lanthanide). Results are as follows: (a) The very small rates of Tc-suppression by impurityatoms M of LnFe1−yMyAs0.89−xF0.11+x (M=Ni, Co, Ru) can be explained only by S++. (b) The00-data for Ba(Fe, Co)2As2 (Tc 23 K) and Ca-Fe-Pt-As crystals seem to be well explained byS++ rather than by S±. (c) The nuclear magnetic resonance data can be consistently understoodby S++, too. These results suggest the S++ symmetry and a novel pairing mechanism, which canbe considered to be related to the elastic softening of C66 induced by the orbital fluctuation of thesystem.
Kim, Sung-Jo,Han, Doseon,Yu, Hye-Weon,O'Rourke, Brian E.,Kobayashi, Yoshinori,Suzuki, Ryoichi,Hwang, Moonhyun,Kim, In S. Elsevier 2018 Desalination Vol.432 No.-
<P><B>Abstract</B></P> <P>To comprehensively investigate the correlation between free volume properties (size and distribution) in the interior of polyamide (PA) active layer and mass transport mechanism, six polyamide thin film composite (TFC) membranes were characterized using positron annihilation lifetime spectroscopy (PALS). In case of pressurized filtration conditions, the rejection rate of boron across all PA membranes was found to be inversely proportional to the free volume size. The more boron transport occurred at the membrane containing larger free volume. In addition, the transition of the neutral boron transport mechanism from convection to diffusion was found to occur at a membrane free volume radius around 0.275nm within the applied pressure range (2 and 10bar), as verified by PALS and the dimensionless Peclet number. We believe that mass transport mechanism transition from convection to diffusion is caused by the compression of polyamide active layer due to applied hydraulic pressure (10bar), resulting in lowering the convective mass transport pathway inside polyamide active layer. These membrane free volume size criteria and experimental filtration results may subsequently be used as new design guidelines for the development of high boron rejection polyamide TFC membranes having a low energy consumption.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The free volume characterization of several polyamide membranes by PALS were performed to evaluate boron transport. </LI> <LI> The transition of boron transport mechanism was observed at a free volume radius around 0.275nm. </LI> <LI> Free volume properties measured by PALS could be used as new design criteria for high boron rejection membranes. </LI> </UL> </P>
Kim, Sung-Jo,Kook, Seungho,O'Rourke, Brian E.,Lee, Jinwoo,Hwang, Moonhyun,Kobayashi, Yoshinori,Suzuki, Ryoichi,Kim, In S. Elsevier 2017 Journal of membrane science Vol.527 No.-
<P><B>Abstract</B></P> <P>We systematically investigate the pore structure of cellulose triacetate (CTA) and polyamide (PA) forward osmosis (FO) membranes with positron annihilation lifetime spectroscopy (PALS) and fractional rejection (FR) method to better understand the relationship between membrane pores (atomic-scale free volume) and separation performance. The results reported in this study suggest a range of membrane pore sizes and inner structures appropriate for the osmotic membrane process regardless of membrane materials. The PALS data suggest that the active layer of both FO membranes is mainly composed of generally uniform pores of larger size (0.29−0.30nm) compared to seawater reverse osmosis (SWRO) (0.20−0.24nm) membranes. The membrane pore size distribution (PSD) deduced by the FR method suggest that the PSD of both FO membranes are significantly shifted to smaller sizes under pressurized conditions, possibly due to the overall compression of the FO membranes. The effects of applied pressure on the structure and performance of active layer should be further investigated along with other properties such as thickness, swelling and sorption properties.</P> <P><B>Highlights</B></P> <P> <UL> <LI> This research provide first suggestion about the active layer pore size and structure of FO membranes. </LI> <LI> Both FO membranes are consisted of active layer with larger free-volume than commercial SWRO and NF membranes. </LI> <LI> The mean pore radius determined by FR method was smaller than the PALS due to hydraulic compression. </LI> <LI> Both PALS and the FR method can be utilized to investigate the dense active layer. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>